Crane-hook.



1. M. BELL.

CRANE HOOK. APPLICAHON FILED MAYHJ, I918.

Patented July 16,1918.

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' emery JOH -1M BEL-ill,- F PORTSMOUTHfOI -IIO.

:ICRI-ANE-HQOK.

2T0 ZZZ who mill mayjconcern J j 1 Be; it-knoWn thatjI, onN'fMg B1 LL, acitizen of f the United"statesf residing"atiPoi'tsmouth, in the countyofScioto andfstate'of Ohio, have invented a new and useful Crane- Hook,of which the following' is a specification, will not readily get out oforderand H "end thereof to can be manipulated readily.

With the foregoing and other objects in view which will appear as thedescription proceeds the invention consists of certain novel details ofconstruction and combinations of parts which will be hereinafter morefully described and pointed out in the claims, it being understood thatvarious changes may be made within the scope of the claims withoutdeparting from the spirit of the invention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings- Figure 1 is a side elevation partly broken away.

Fig. 2 a plan view of the top plate of the device.

Fig. 3 is a. section on line 3-3, Fig. 1.

Fig. 4 is a bottom plan view.

Referring to the figures by characters of reference, 1 designates ashank formed of two opposed similar bars 2 and 3 which are held togetherby rivets 4 or the like. The inner faces of the members 2 and 3 arebeveled along one edge, as shown at 5 so as thus to cooperate to form anangular channel or groove 6 extending longitudinally of the shank.Registering grooves 7 extend longitudinally along the inner faces of thetwo bars and form a passage '8 extending throughout the length of theshank. Guide grooves 9 are provided in the outer sides of the bars. 3

A top plate or cap 10 is bolted or otherwise fastened to the top of theshank 1 and projects beyond the channel 6, the projecting portion of theplate beingformed with openings 11 located beyond the shank and with anopening 12 which registers with the passags it 1 Specification: 01Lettersira'tent.

the sham: and is, made .of each "section being integral with the lowerfend of'oneof the bars 2 ends and the two sections being-held togetherlwith rivets or the like,fas shown. An opening l4isIproin the passage 8and is ApplicationfiIdMayfiO, this. seem... 233,717.

I Ajaiv 13'is provided at thellower cnd'of two like sections,

v'ided between.tlie'lowenportions of thebars jan d 'bacl rif the jaw,and within this opening isjjonrnileda slieave'15. V .2S 1*a. dling theshank 1 ;land slidably l' ollnted thereonEis awaleiiaving a. tanninguid'e lug 117* projectinginto the I'channel- '6 and inwardly Iectmginto the grooves 9. The 3 lug .16, ;is

extei'idingside lugs 18 prop fefl ably formed with a recess 19 in theprovide a clearance for the purpose hereinafter described.

A cable 20 or the like works freely withprovided at its upper end, abovethe plate 10, with a loop for engaging a hook or the like, not shown,and which constitutes part of the hoisting mechanism. The cable 20 isextended under the sheave l5 and upwardly Within the channel 6 andthrough the recess 19, the upper end of this portion of the cable beingsecured in any desired manner to the jaw 16.

Coiled springs 21 are secured to the jaw 16. close to the shank l andextend loosely through the openings 11, their upper ends being attachedto the loop 22 at the upper end of the cable 20.

Under normal conditions the springs support the j awsin the relativepositions shown in Fig. 1. When the jaw 13 is placed under a load to belifted and the loop 22 is pulled upwardly, the cable 20 will pull thejaw 16 downwardly against the action of the springs 21 until said jaw 16is'brought against the top of the load whereupon the load will begripped tightly and further elevation of the loop will result in theelevation of the load. Obviously the grip upon the load will increase inproportion to the weight. When the load is springs 21 will pull the jaw16 upwardly, thus releasing the load.

What is claimed is 1. A device of the class described including a shank,a fixed jaw at one end thereof, a sliding jaw upon the shank, means forengaging a hoisting apparatus, a connection between said means and themovable jaw for shifting the movable jaw to ward the fixed jaw duringthe upward movement of said means relative to the shank,

deposited, the j jaw and a slidable jaw, of support engag-l'- ing means,a flexible operative connection between the movable j aw and said means.to

shift the jaw downwardly toward the fixed jaw during the upward movementof said means relative to the shank, and an elastic connectlonbetweensaid means and the movable aw placed under 'increaslng tensionduringsuch relative movement of the jaws.

The combination with a shank having a fixed jaw at its lower end, therebeing a passage extending longitudinally within the shank, of a sheavejournaled in the shank and back of said jaw, a slidable jaw upon theshank, a support engaging element, a flexible connection between saidelement and the slidable jaw, said connection extending through thepassage and Copies of this patent may be obtained for into engagementwith "the sheave, and'ielastic connections slidable ]aW'.*- i,

between said element and the 4. The combination with a shank, a fixedjaw and a slidable jaw, of support'engag' ing means, a flexibleoperative connectlon l between the movable jaw and said means to shiftthe aw downwardly toward the fixed jaw during the upward movement ofsaid means relative to the shank, and an elastic member connected to theslidable jaw and adapted to be placed under increasing tension duringthe movement of said jaw toward the fixed jaw;

In testimony that I claim the foregoing as my own, I have hereto'afiixedmy signature in the presence of two witnesses,

' Witnesses:

' E. ;A. 'EYNoN,

. vv H. HoLBnooK.

' tO I-IN MTBI JLL, j

five cents each, by addressing the Commissioner of Patents, Washington,D. G. i I

